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- W2000360138 abstract "Until now, long-wavelength (1.3/1.55 µm) vertical-cavity lasers with two dielectric mirrors have suffered from too low an injection efficiency (which is the result of lateral current injection) and a high thermal resistance (induced by the low thermal conductivity of the dielectric materials). A novel structure for such devices is proposed, which has improved both thermal and electrical characteristics: an undercut InGaAsP layer enables one to define a diaphragm which funnels current paths towards the centre of the cavity and confines the optical mode, thus increasing injection efficiency. Thermal behaviour is improved by realisation of a mesa-like top structure embedded in electrolytic gold. For these lasers, the temperature-dependent threshold condition is first determined theoretically, and some simple design rules are established using efficient simulation softwares. Such devices including two (SiO2/Si) dielectric mirrors were fabricated and operate at 1.3 µm in the continuous-wave regime up to –15°C with threshold currents of 8 mA for 6 µm wide diaphragms." @default.
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- W2000360138 date "1998-04-01" @default.
- W2000360138 modified "2023-09-28" @default.
- W2000360138 title "Undercut ridge structures: A novel approach to 1.3/1.55 µm vertical-cavity lasers designed for continuous-wave operation" @default.
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- W2000360138 doi "https://doi.org/10.1049/ip-opt:19981678" @default.
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